Effect of alloying on the giant magnetocaloric effect of Gd-5(Si2Ge2)

被引:332
作者
Pecharsky, VK [1 ]
Gschneidner, KA [1 ]
机构
[1] IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011
关键词
magnetocaloric effect; alloying; substitution effect;
D O I
10.1016/S0304-8853(96)00759-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A study of the effect of different alloying additions substituting for nonmagnetic Si and Ge on the giant magnetocaloric effect observed for the compound Gd-5(Si2Ge2) revealed that small amounts (similar to 0.33 at%) of Ga raise the Curie temperature and preserve the giant magnetocaloric effect. Larger quantities of Ga lead to a significant reduction in the magnetocaloric effect, but the Curie temperature continues to rise. Many 3d-metal and p-element additions also reduce the magnetocaloric effect in Gd-5(Si2Ge2) due to the changes in the thermodynamic nature of the magnetic phase transition. In general, all alloying additions raise the Curie temperature of the parent Gd-5(Si2Ge2).
引用
收藏
页码:L179 / L184
页数:6
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